I'm not sure of the construction on the xm240 but the 40-2cd had a common problem that sounds like that. They used a sheet metal screw to hold the wire from the loading coil to the element and then p
Want to learn more about BPL? Here is a good chance in Western Massachusetts. Includes presentation by Ed Hare of the ARRL. IEEE Berkshire Section Power Chapter Presents Seminar on Broadband Over Pow
Just get smaller rod that fits inside the legs, that should be plenty strong enough. Or get fiberglass tube with an ID that matches the leg OD. I did that for some 48' loaded verticals some years ago
You are mixing up a couple things... 'cosmic rays from a strike' has nothing to do with how strokes occur. There is some evidence for very large strokes causing enough of a field to cause x-rays and
Unfortunately that doesn't match up with well know and published information about lightning. The development of the stepped leader has been tracked using vhf triangulation techniques to generate 3d
Too small... use one of these and you can spool out the wire yourself as you fly over the trees! http://kwc.org/blog/archives/2005/2005-09-05.mythbusters_border_slingshot.ht ml#more David Robbins K1T
Well, while powering up today for the weekend contest one of my Yaesu rotor control box indicators failed to turn. So I pulled out one of the spare boxes and plugged that in... unfortunately when I t
Sounds like something pretty small for either a vacuum or anything in a car. I was thinking maybe more like a hobby shop for robot experimenters or miniature car models. And I don't need it for the c
My book has several examples of plumbing store hardline fittings. You can do just about anything up to 1" stuff with off the shelf fittings and a barrel connector. I prefer to use reducers rather tha
For those who may be interested, or who later search the archives, the replacement o-ring I found for the g-1000sdx box (should also be the same for g-2700sdx and g-2800sdx at least) is a 1-1/2x1-3/8
I would expect it to go up in frequency. David Robbins K1TTT e-mail: mailto:k1ttt@arrl.net web: http://www.k1ttt.net AR-Cluster node: 145.69MHz or telnet://dxc.k1ttt.net _____________________________
None of the 8 rcs-8v's that I have in use grounds the unused ports by default. You can ADD a jumper to the relay box for each port you want to ground when it is not selected, which I have done when
of course for yagi's built with certain types of matches there is no need for either of these. leaving an open ended feedline will also have the same effect depending on the length of the line. you
Normally all failures like that will have more information in the header about why it failed. Most isp's have someone who can help you figure out what the problem is if you can't read headers. David
The ONLY safe use is for moving objects weighing less than the pole's rating straight up or down the side of the tower. Using it to handle something that is being pulled sideways out away from the to
I am looking at the new mfj rcs-12c remote switch controller. It is an 8 pushbutton box that controls up to 8 relays or bcd output, has built in band decoding with programmable buttons, last antenna
I could use a few of those myself.... after doing some searching the closest I can find look like: Part 9134 at: http://froogle.google.com/froogle?q=lamp+wire+axial+12v&hl=en&lr=&sa=N&tab=f f&sa=X&oi
Has anyone put a 40m4lldd on a tic ring rotor?? If so, please contact me off the list for a question about mounting and the phasing line. David Robbins K1TTT e-mail: mailto:k1ttt@arrl.net web: http:/
Don't get started on tin foil hats until you read this: http://people.csail.mit.edu/rahimi/helmet/ David Robbins K1TTT e-mail: mailto:k1ttt@arrl.net web: http://www.k1ttt.net AR-Cluster node: 145.69M
Maybe not exactly radio towers, but interesting anyway. http://www.insulators.com/pictures/?id=153051580 David Robbins K1TTT e-mail: mailto:k1ttt@arrl.net web: http://www.k1ttt.net AR-Cluster node: 1